### Home > INT3 > Chapter 10 > Lesson 10.2.2 > Problem10-135

10-135.

In a unit circle, if sin(β) = – and πβ , what are the exact values of cos(β) and tan(β)? Homework Help ✎

Recall the trigonometric equations such as:
sin2 β + cos2 β = 1

$\text{cos} \beta = - \frac{3}{4}, \text{tan}\beta= \frac{4}{3}$